Portable folding fan



FIG. 1 is a perspective view of a portable folding fan showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom plan view thereof; and,

FIG. 8 is a top view thereof shown the folded state.

The broken lines in the drawings depict portions of the portable folding fan that form no part of the claim. 

CLAIM The ornamental design for a portable folding fan, as shown and described. 